You didn't read the post you were replying to. That would be a "math nerd solution" that the states have not committed to accept, regardless of whether it actua

You didn't read the post you were replying to. That would be a "math nerd solution" that the states have not committed to accept, regardless of whether it actually works. Also, that sort of thing tends to require active cooperation from the entity issuing the IDs, which no state governments have committed to provide. By the way, Pornhub actually has a preferred technical solution involving "device attestation". It's only marginally better than the snake oil the AV industry wants to use, and I don't like it, but they have said they'd stop objecting if something along those lines were standardized. They just don't want to have to deal with a patchwork of mutually incompatible stuff (a) that's totally ineffective, (b) that leaves them either handling everybody's ID or dealing with questionable contractors to hold it, and/or (c) that leaves them having to convince the users to trust them or those questionable contractors with those ID images.